[gtiteen]

Ok been fiddling and reading user guides.... Greig I have no idea what you mean lol. Will go have a look now.

I dont have the foggiest when it comes to heating systems, just been using what very little brain power I have!

There is domestic hot water. Tried resetting the boiler, and even with all the thermostats on full and the controls on continuous after the reset it goes to status 1 for a second or 2 and the burner light shows. It then goes straight to boiler status 0 (which means no demand for heat). Pressure is reading 1.8 bar.

I'm guessing it means the boiler is not being told to turn on for the heating for some reason so possibly something electrical?

Could it be an airlock?